TRÄGÅRDH, TWO MYRIOPODOPHILOUS ANTENNOPHORIN^. 29 



As a matter of fact a comparison between Sejodes and the 

 most primitive forms of the Antennophorinse viz. Parantennu- 

 lus and the tritonymphae of Neomegistus shows that they agree 

 in some essential points. The shape of the body is in all more 

 or less circular. Well developed metapodial shields are pre- 

 sent; in Sejodes, P . scolopendrarum and the tritonympha femi- 



Fig. 12. Sejodes ursinus, ventral view. Fig. 13. Parantennulus sco- 

 lopendrarum, genital, ventral and metapodial shields. Fig. 14. Trito- 

 nympha 9 generans of Neomegistus, sternal and genital shields. Fig. 15. 

 Genital shields of Physalozercon. Fig. 16. Sternal, genital- and ven- 

 trianal shields of Antennophorus. Fig. 17. Antrnno77iegistus, ventral 

 view. Fig. 18. Sternal and genital shields of Echinomegistus: j. jugvilar. 

 ]Mt. nietasternnm, pp. metapodial, g. genital, Ep. epigj^nial, pg. paragj-nial, 

 v. a. ventrianal shield. 



nina generans of N. they are demarcated from the ventri-anal 

 shield; in P. viduus and che tritonympha masculina of N. they 

 are fused mth the ventri-anal shield. The lower jaw of the 

 chela is provided with a fringed appendage, which especially in 8. 

 ursinus and the tritonympha bear a great ressemblance to each 

 other (ef. Berlese Tav. 126. fig. 7 and figs. 16 and 17. Pl. I). 



